INDEX 
Absorption, 78, 86. 
Adaptation, 328, 337. 
Air pores, 168. 
Air roots, 82. 
Air spaces, 18. 
Akene, 239. 
Aleurone grains, 89. 
Alfalfa, 293. 
Alge, 98, 165; blue-green, 98; 
brown, 116; green, 102; red, 124. 
Alga-like Fungi, 144. 
Alternation of generations, 183; 
fern, 196; liverwort, 171; moss, 
180. 
Amaryllidacex, 278. 
Ament, 283. 
Angiosperms, 220. 
Annual rings, 54. 
Anther, 224. 
Antheridium, Bryophyte, 184; 
fern, 193; Fucus, 124; liverwort, 
169; mildew, 145; moss, 177; 
(Edogonium, 110; Peronospora, 
143; red Algze, 127; Selaginella, 
204; Vaucheria, 112. 
Anthoceros, 173, 183. 
Antitoxin, 135. 
Apples, 289. 
Apricots, 288. 
Arbor Day, 323. 
Archegonium, Bryophyte, 184; 
conifer, 216; fern, 193; liverwort, 
169; moss, 177; Selaginella, 205. 
Archichlamydez, 282. 
Ascomycetes, 146. 
Ascus, 146. 
Assimilation, 88. 
Associations, 324; see Plant asso- 
ciations. 
Axil, 42. 
Bacteria, 130; disease, 134, 135; 
fermentation, 134; nitrogen fix- 
ation, 134, 135; reproduction, 
132; resistance, 133; root-tuber- 
cles, 136; spores, 133; structure, 
131. 
Bamboo, 271. 
Banana, 280. 
Bari, 55. 
Barley, 267. 
Basidia, 155. 
Basidiomycetes, 158. 
Bast, 51; root, 74. 
Bean, 294. 
Berry, 239, 286, 298. 
Big tree, 219. 
Blackberry, 287. 
Black knot, 147. 
Blade, 6. 
Blueberry, 303. 
Blue-green Algae, 98. 
Bog moss, 181. 
Bracket Fungi, 156. 
Branches, root, 76. 
Brown Alge, 116. 
857 
